Wall clock



FIG. 1 is a front elevational view of a wall clock showing my new design; and,

FIG. 2 is a right side elevational view of my new design, the top, bottom, and left side views being substantially similar thereto.

The rear of the claimed design is plain and unornamented; the broken-line outline of a mechanism is environmental only and forms no part of the claimed design. 

The ornamental design for a wall clock, as shown and described. 